21331223300 has 72 divisors (see below), whose sum is σ = 46622349312. Its totient is φ = 8471232000.

The previous prime is 21331223279. The next prime is 21331223311. The reversal of 21331223300 is 332213312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9229145 + ... + 9231455.

Almost surely, 2^21331223300 is an apocalyptic number.

21331223300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21331223300 is an abundant number, since it is smaller than the sum of its proper divisors (25291126012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21331223300 is a wasteful number, since it uses less digits than its factorization.

21331223300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2949 (or 2942 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21331223300 its reverse (332213312), we get a palindrome (21663436612).

The spelling of 21331223300 in words is "twenty-one billion, three hundred thirty-one million, two hundred twenty-three thousand, three hundred".